Genesis of clay minerals and its insight for the formation of limestone marl alterations in Middle Permian of the Sichuan Basin

A Method for Prediction of High-Water-Production Areas in Coalbed Methane Blocks Based on γ Logging Data: A Case Study of the Taiyuan Formation in Liulin Area, Eastern Ordos Basin, China

“…The roof limestone of the coal seam of the high-yield water well is a fracture-developed layer section with active water activity, and the dissolved oxygen and carbon dioxide in the water will react with the carbonate minerals of the limestone (eq ). At the same time, the limestone is gradually dissolved by dissolution, and the impurities in the limestone eventually lead to an increase in clay content. , On the other hand, it is due to the hydrodynamic transportation: the clay from other formations is transported into the pores and fractures of the roof limestone and deposited during the formation water flow Figure shows a thin section of limestone that has been subjected to dissolution in the study area.…”